On 2010年7月21日 19:45:24 -0700, John Nagle wrote: > Did class inheritance from "dict" work in early Python? Or did that > only start working when "new objects" came in? Only with the introduction of new-style classes and "object" in version 2.2. http://www.python.org/download/releases/2.2.3/descrintro/#subclassing Before that the technique of choice was to use automatic delegation, e.g. see the UserDict module. -- Steven